School-slate hinge



(No Model.)

J. M. WATERS. School Slate Hinge.

No. 234,235. Patented Nov. 9,1880.

FIG. 1.

2 Inventor. I j ,1 014% j N PETERS PHOTO LITHDGRAPH UNITE STATES PATENT OFFICE.

JABEZ M. WATERS, OF CINCINNATI, OHIO.

SCHOOL-SLATE HINGE.

SPECIFICATION forming part of Letters Patent No. 234,215, dated November 9, 1880.

Application filed May 10, 1880. (No model.)

To all whom it may concern:

Be it known that I, JABEZ M. WATERS, of Cincinnati, Hamilton county, Ohio, have invented certain new and nsetul lmprovements in School-Slate Hinges, of which the following is a specification.

This invention relates to those hinges which are employed for coupling together a pair of frames in order that the opposite sides of each slate may be used as occasion requires; and my improvement comprises a novel combination of slotted frames, perforated links or hinges, and barbed pintles or pivots, as hereinafter fully described, and pointed out in the claim.

In the annexed drawings, Figure l is an elevation of a portion of two slate-tram es coupled together with myim proved hinges, said frames being shown open and the upper part of one of them sectioned, so as to expose the barbed pintle or pivot. Fig. 2 is an enlarged transverse section taken in the plane of one of the hinges, the frames being shown in their closed condition. Fig. 3 is a perspective view of one of the hinges or links and its accompanying barbed pintles, and Fig. 4 is a plan of an old and well-known form of slate-hinge.

AB represent, respectively, two slate-frames, whose corners may be either square or curved, the adjacent edges of said frames being rounded off at a b, as more clearly shown in Fig. 2. Furthermore, these meeting Y edges of said frames are slotted, respectively, at (J O and D D, which slots may be mere saw-kerfs. Fitting snugly within these slots or kerfs are the links or hinges E, made, preferably, of light sheet metal capable of being readily cut and punched, which latter operation produces the eyes or apertures e e, that receive the pintles or pivots F. These pivots are composed of wire, suitably barbed or nicked at f to prevent them being pulled out of their sockets,

which latter are bored longitudinally of the frames A B and parallel with their meetingedges or b.

When the links E are secured in the kerfs O U D D in the manner shown the frames A B can be opened in either direction to expose the opposite sides of the slates, while the barbs fprevent the pintles F working out of their sockets, no matter how long the slates may be in use.

I am aware it is not new to unite a pair of slate-frames so as to allow them to be opened in opposite directions, or, in other words, to be reversible, as such an old and well-known construction is seen in Fig. 4, Where the two frames A B are shown coupled by means of two crossed straps, G H, which form of slatehinge has been in use for more than thirty years.

I am also aware it is not new to insert perforated links in slotted slate-frames and secure them therein by smooth or unbarbed pintles or pins, as such a hinge is seen in the patent issued to E. W. Roberts, January 21, 1873.

Such being the state of the art, my claim is not to be construed broadly, but is limited to the within-described combination of slotted frames, perforated links or their equivalents, and nicked or barbed pivots.

1 claim as my invention- In combination with slate-frames A B, having slots 0 O and D D, the links E, perforated at e e, and pintles F, barbed or nicked at f and passed through the links in holes longitudinal with the frames, substantially as and for the purpose set forth.

In testimony of which invention I hereunto set my hand.

JABEZ M. WATERS.

Witnesses:

JAMES H. LAYMAN, J. O. ROBISON, Jr. 

